CN207251178U - Dry burning prevention device of electronic cigarette - Google Patents
Dry burning prevention device of electronic cigarette Download PDFInfo
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- CN207251178U CN207251178U CN201721019191.1U CN201721019191U CN207251178U CN 207251178 U CN207251178 U CN 207251178U CN 201721019191 U CN201721019191 U CN 201721019191U CN 207251178 U CN207251178 U CN 207251178U
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- 239000003571 electronic cigarette Substances 0.000 title claims abstract description 48
- 230000002265 prevention Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000009841 combustion method Methods 0.000 claims abstract description 23
- 239000004065 semiconductor Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 241000208125 Nicotiana Species 0.000 abstract description 10
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 10
- 235000011389 fruit/vegetable juice Nutrition 0.000 abstract description 10
- 238000005070 sampling Methods 0.000 abstract description 5
- 235000019504 cigarettes Nutrition 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000391 smoking effect Effects 0.000 description 3
- 206010053615 Thermal burn Diseases 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model relates to an electron cigarette prevent dry combustion method device. The anti-dry burning device of the electronic cigarette comprises a microcontroller, a lifting pressure bridge circuit, an atomizer resistance value sampling circuit, an atomizer resistance value detection module and a battery power supply circuit, wherein the microcontroller is sequentially electrically connected with the lifting pressure bridge circuit, the atomizer resistance value sampling circuit, the atomizer and the atomizer resistance value detection module and then connected back to the microcontroller, the atomizer resistance value sampling circuit is also electrically connected with the atomizer resistance value detection module, a feedback circuit is connected between the atomizer resistance value sampling circuit and the lifting pressure bridge circuit and connected back to the microcontroller so that the microcontroller can adjust the output voltage of the lifting pressure bridge circuit and keep stable, when the electronic cigarette is in use and the tobacco juice is exhausted quickly, the atomizer resistance value detection module detects that the resistance value of the atomizer continuously exceeds the set times of dry burning protection set resistance value, the microcontroller instructs the lifting pressure bridge circuit to close the output, the electronic cigarette automatically stops working.
Description
Technical field
A kind of electronic cigarette technical field is the utility model is related to, more particularly to a kind of anti-dry burning device of electronic cigarette.
Background technology
Existing electronic cigarette generally comprise suction nozzle, housing and the device for storing liquid being set in housing, atomizing component, power supply and
Circuit control panel, and dry combustion method protection module of not setting up defences.Existing electronic cigarette, be required for adding manually after tobacco juice is finished tobacco juice or
Device for storing liquid is replaced, can be continuing with, when the tobacco juice in device for storing liquid is finished, user is without addition tobacco juice or replacement in time
Device for storing liquid and when continuing smoking, the circuit of circuit control panel control continues to work so that the heating module in atomizing component
Dry combustion method occurs because lacking tobacco juice and causing temperature drastically to raise, so as to produce pernicious gas and the smell of burning is inhaled into human body, there is victimization
Body health, the heat in addition drastically produced, which is conducted to remaining position of electronic cigarette, also easily burns out electronic cigarette or scald human skin.
The content of the invention
The purpose of this utility model is to provide a kind of tobacco juice worked as in electronic cigarette device for storing liquid and is finished and user's continuation smoking
When, the anti-dry burning device of the electronic cigarette of dry combustion method will not occur.
The technical solution of the utility model is：Including microcontroller, buck bridge circuit, atomizer resistance value sampling electricity
Road, atomizer, atomizer resistance value detection module, battery feed circuit, the battery feed circuit include switch and it is chargeable
Battery, the microcontroller are sequentially connected electrically buck bridge circuit, atomizer resistance value sample circuit, atomizer, atomizer resistance value
Microcontroller is taken back after detection module, the atomizer resistance value sample circuit is also electrically connected atomizer resistance value detection module, described
Feedback circuit is connected between atomizer resistance value sample circuit and the buck bridge circuit, the feedback circuit takes back microcontroller
Device, so that microcontroller adjusts the output voltage of buck bridge circuit and keeps stable；When electronic cigarette works, atomizer resistance value
Detection module continuously detects the resistance value of atomizer according to the interval setting time of microcontroller, when the resistance value of atomizer continues to exceed
When the number that dry combustion method protection sets resistance value and continues to exceed reaches setting number, micro-controller instructions buck bridge circuit is closed
Output, electronic cigarette are automatically stopped work.
As preferred：Short-circuit detecting module is further included, the atomizer accesses short-circuit detecting module, the short-circuit detecting mould
Block accesses microcontroller.
As preferred：Charging circuit, charger, charger voltage detection module are further included, the microcontroller is electrically connected
Charging circuit, the charger are electrically connected charger voltage detection module and are followed by into microcontroller, and the charger is electrically connected successively
Charging circuit and battery feed circuit are connect, the battery feed circuit is powered to microcontroller and buck bridge circuit respectively.
As preferred：The microcontroller is electrically connected LED control module and auxiliary boost module, the auxiliary boost
Module accesses the buck bridge circuit.
As preferred：It is additionally provided with temperature sensor and battery temperature detection module, during charging, the temperature sensor detection
The temperature signal of battery simultaneously accesses the battery temperature detection module, then accesses microcontroller by the battery feed circuit,
When temperature signal exceedes design temperature value range, micro-controller instructions charging circuit stops charging；During electric discharge, the temperature passes
When sensor detects that temperature signal exceedes design temperature value range, micro-controller instructions half-bridge booster circuit or chopping depressuring circuit
Output is closed, electronic cigarette is stopped.
As preferred：The atomizer resistance value detection module includes amplifier U4, resistance R16, resistance R17, capacitance C12, resistance
R19, capacitance C13, resistance R22, capacitance C14With capacitance C15, the atomizer resistance value sample circuit includes resistance R18, the amplifier U4
With the first pin REF, second pin GND, the 3rd pin VCC, the 4th pin IN+, the 5th pin IN- and the 6th pin OUT,
Amplifier U4The 4th pin IN+ connect capacitance C respectively12With resistance R17Buck bridge circuit output terminal VOUT is accessed afterwards, and the 5th draws
Foot IN- connects capacitance C respectively12With resistance R16Atomizer output terminal PWM-OUT, resistance R are accessed afterwards16With atomizer output terminal
The on line node and resistance R of PWM-OUT17Resistance R is connected between the on line node of buck bridge circuit output terminal VOUT18, fortune
Put the 6th pin OUT connection resistance R of U419After be respectively connected to current detection signal IDET and capacitance C13, capacitance C13Another termination
Ground, amplifier U4The first pin REF and second pin GND ground connection, amplifier U4The 3rd pin VCC connection resistance R22After access it is auxiliary
Help boosting VCC-12V, the 3rd pin VCC and resistance R22Between node connect capacitance C respectively15With capacitance C14, capacitance C15And electricity
Hold C14The other end ground connection；When electric current passes through resistance R18When, resistance R18Both ends meeting partial pressure, by resistance R16, resistance R17, capacitance
C12Once filtered and be input to amplifier U again4, amplifier U4Filtered voltage is amplified and by resistance R19, capacitance C13
Filter, then the resistance value of atomizer is calculated by current detection signal IDET.
As preferred：The buck bridge circuit includes chip U1, chip U2, metal-oxide-semiconductor Q1And Q2, metal-oxide-semiconductor Q3And Q4, first
Zener diode, the second zener diode, resistance R1, resistance R2, resistance R3, capacitance C1, capacitance C3, capacitance C2, capacitance C4And electricity
Feel L1, the chip U1The first pin VCC connection capacitances C3After be grounded, chip U1The 3rd pin HO accesses metal-oxide-semiconductor Q2Grid
Pole, chip U1The tenth pin LO accesses metal-oxide-semiconductor Q1Grid, the chip U2The first pin VCC connection capacitances C4It is followed by
Ground, chip U2The 3rd pin HO accesses metal-oxide-semiconductor Q3Grid, chip U2The tenth pin LO accesses metal-oxide-semiconductor Q4Grid, core
Piece U1The 4th pin HS pass through inductance L1Access chip U2The 4th pin HS, chip U1Second pin connect voltage stabilizing respectively
Diode D1, capacitance C1, capacitance C1Other end access chip U1The 4th pin HS, zener diode D1Other end accesses core
Piece U1The first pin VCC, chip U2Second pin connect zener diode D respectively2, capacitance C2, capacitance C2Other end connects
Enter chip U2The 4th pin HS, zener diode D2Other end access chip U2The first pin VCC, chip U1With chip U2
Respective 9th pin VSS is grounded, chip U1The 8th pin IN connect microcontroller boosting output frequency signal end
PWM-UP, chip U2The 8th pin IN connect microcontroller reduced output voltage frequency signal end PWM-DN, chip U1With chip U2
Respective 7th pin EN is all connected with the output control signal end PWM-EN, chip U of lifting breaking the bridge27th pin EN is controlled with output
Signal end PWM-EN on lines Node connectedness resistance R processed3After be grounded, chip U1The 6th pin RDT connecting resistances R1After be grounded, chip
U2The 6th pin RDT connecting resistances R2After be grounded；When cell voltage is less than output voltage, buck bridge circuit decompression driving core
Piece U2Export signal and open metal-oxide-semiconductor Q3, pass through inductance L1Connect chip U1, metal-oxide-semiconductor Q1And Q2, boosting driving chip U1Pass through micro-control
Device output PWM-UP control signal driving metal-oxide-semiconductors Q processed1And Q2Boosting output VOUT；Conversely, when cell voltage is higher than output voltage
When, buck bridge circuit boosting driving chip U1Export signal and open metal-oxide-semiconductor Q2, pass through inductance L1Connect chip U2, metal-oxide-semiconductor Q4With
Q3, decompression driving chip U2PWM-DN control signals are exported by microcontroller and drive metal-oxide-semiconductor Q4And Q3Reduced output voltage VOUT.
Compared with prior art, the beneficial effects of the utility model：
The electronic cigarette is equipped with anti-dry burning device, is provided with buck bridge circuit, atomizer resistance value sample circuit and atomization
Device resistance value detection module, can detect atomizer in fever bulk resistor resistance value signal, when atomizer because lack tobacco juice and after
Continuous work, causes the number that the resistance value of atomizer exceedes dry combustion method protection setting resistance value and continues to exceed to reach when temperature drastically raises
During to setting number, the anti-dry burning device of electronic cigarette judges and cuts off the power supply output of buck bridge circuit in time, prevents
Dry combustion method occurs for atomizer, so as to prevent pernicious gas and the smell of burning to be inhaled into human body and be detrimental to health, and avoids electronic cigarette
It is burned or scalds human body.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the anti-dry burning device of the utility model electronic cigarette；
Fig. 2 is the circuit diagram of the utility model atomizer resistance value detection module；
Fig. 3 is the circuit diagram of the utility model buck bridge circuit；
Fig. 4 is the flow chart of the utility model electronic cigarette anti-dry control method.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing：
Fig. 1 shows the anti-dry burning device of the utility model electronic cigarette.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, including microcontroller, buck bridge circuit,
Atomizer resistance value sample circuit, atomizer, atomizer resistance value detection module, battery feed circuit, battery feed circuit include opening
Close and rechargeable battery, microcontroller is sequentially connected electrically buck bridge circuit, atomizer resistance value sample circuit, atomizer, mist
Microcontroller is taken back after changing device resistance value detection module, atomizer resistance value sample circuit is also electrically connected atomizer resistance value detection module,
Feedback circuit is connected between atomizer resistance value sample circuit and buck bridge circuit, feedback circuit takes back microcontroller, so as to
The output voltage of microcontroller adjustment buck bridge circuit simultaneously keeps stable；When electronic cigarette works, atomizer resistance value detection mould
Root tuber continuously detects the resistance value of atomizer according to the interval setting time of microcontroller, is protected when the resistance value of atomizer continues to exceed dry combustion method
When the number that shield sets resistance value and continues to exceed reaches setting number, micro-controller instructions buck bridge circuit closes output,
Electronic cigarette is automatically stopped work.Above-mentioned setting detected resistance continues to exceed dry combustion method protection setting resistance value and continues to exceed setting resistance
The meaning that value reaches setting number is, the rise of atomizer resistance value can be caused to cause unnecessary dry combustion method to be protected to avoid accidental factor
Shield.Because when also having tobacco juice that dry combustion method will not occur in electronic cigarette sometimes, there are accidentalia to cause a mist measured twice once in a while
Change setting resistance value of the device resistance value moment more than dry combustion method protection, if such a situation starts dry combustion method protection and closes down the work of electronic cigarette
Make, it is clear that do not meet actual conditions, bad usage experience is brought to user.Only when the atomizer that continuous several times detect
Resistance value exceedes the setting resistance value of dry combustion method protection, and when reaching setting number, could really reflect the objective circumstances of dry combustion method, this
Shi Jinhang, which is closed down, can just carry out dry combustion method protection.
In the anti-dry burning device of the utility model electronic cigarette, atomizer is including the temperature-sensitive heating wire in heat-generating units (in figure
Do not show), the resistance of temperature-sensitive heating wire is varied with temperature and changed, therefore is detected its resistance and can be calculated corresponding temperature
Value.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, further includes short-circuit detecting module, atomizer
Access short-circuit detecting module, short-circuit detecting module access microcontroller.Short-circuit detecting module is used for the temperature-sensitive electricity for detecting atomizer
Whether heated filament occurs short circuit, and short circuit such as occurs, then microcontroller can instruct buck bridge circuit to close output and be protected, electricity
Sub- cigarette is stopped.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, further includes charging circuit, charger, charging
Device voltage detection module, microcontroller is electrically connected charging circuit, charger is electrically connected charger voltage detection module and is followed by a subtle way
Controller, charger are sequentially connected electrically charging circuit and battery feed circuit, and battery feed circuit is respectively to microcontroller and liter
It is depressured bridge circuit power supply.Charging voltage detection module works in charging, prevents charger from overcharging.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, microcontroller is electrically connected LED controls
Module and auxiliary boost module, auxiliary boost module access buck bridge circuit.LED control module is used to control LED light
The instruction of different brightness or different colours or its combination is carried out to smoking state, switch detection module is used to close key switch
State or closing time are detected, and auxiliary boost module is used for compensation or assistance for lifting breaking the bridge circuit preferably to be risen
Pressure.
Refering to Figure 1, the anti-dry burning device of the utility model electronic cigarette, is additionally provided with temperature sensor and battery temperature
Detection module, during charging, the temperature signal of temperature sensor monitoring cell simultaneously accesses battery temperature detection module, then passes through battery
Power supply circuit accesses microcontroller, and when temperature signal exceedes design temperature value range, micro-controller instructions charging circuit stops
Charging；During electric discharge, when temperature sensor detects that temperature signal exceedes design temperature value range, the boosting of micro-controller instructions half-bridge
Circuit or chopping depressuring circuit close output, and electronic cigarette is stopped.Battery temperature detection module be used for detect battery charging and
Temperature during electric discharge, avoids the excessive danger for being damaged or exploding of battery temperature.
Refer to shown in Fig. 2, atomizer resistance value detection module includes amplifier U4, resistance R16, resistance R17, capacitance C12, resistance
R19, capacitance C13, resistance R22, capacitance C14With capacitance C15, atomizer resistance value sample circuit includes resistance R18, amplifier U4With first
Pin REF, second pin GND, the 3rd pin VCC, the 4th pin IN+, the 5th pin IN- and the 6th pin OUT, amplifier U4's
4th pin IN+ connects capacitance C respectively12With resistance R17Buck bridge circuit output terminal VOUT, the 5th IN- points of pin are accessed afterwards
Lian Jie not capacitance C12With resistance R16Atomizer output terminal PWM-OUT, resistance R are accessed afterwards16With atomizer output terminal PWM-OUT's
On line node and resistance R17Resistance R is connected between the on line node of buck bridge circuit output terminal VOUT18, the of amplifier U4
Six pin OUT connection resistance R19After be respectively connected to current detection signal IDET and capacitance C13, capacitance C13The other end is grounded, amplifier
U4The first pin REF and second pin GND ground connection, amplifier U4The 3rd pin VCC connection resistance R22After access auxiliary boost
VCC-12V, the 3rd pin VCC and resistance R22Between node connect capacitance C respectively15With capacitance C14, capacitance C15With capacitance C14
The other end ground connection；When electric current passes through resistance R18When, resistance R18Both ends meeting partial pressure, by resistance R16, resistance R17, capacitance C12Into
Row once filters is input to amplifier U again4, amplifier U4Filtered voltage is amplified and by resistance R19, capacitance C13Filtering,
The resistance value of atomizer is calculated by current detection signal IDET again.
Refer to shown in Fig. 3, buck bridge circuit includes chip U1, chip U2, metal-oxide-semiconductor Q1And Q2, metal-oxide-semiconductor Q3And Q4,
One zener diode, the second zener diode, resistance R1, resistance R2, resistance R3, capacitance C1, capacitance C3, capacitance C2, capacitance C4With
Inductance L1, chip U1The first pin VCC connection capacitances C3After be grounded, chip U1The 3rd pin HO accesses metal-oxide-semiconductor Q2Grid,
Chip U1The tenth pin LO accesses metal-oxide-semiconductor Q1Grid, chip U2The first pin VCC connection capacitances C4After be grounded, chip U2
The 3rd pin HO accesses metal-oxide-semiconductor Q3Grid, chip U2The tenth pin LO accesses metal-oxide-semiconductor Q4Grid, chip U1The 4th
Pin HS passes through inductance L1Access chip U2The 4th pin HS, chip U1Second pin connect zener diode D respectively1, electricity
Hold C1, capacitance C1Other end access chip U1The 4th pin HS, zener diode D1Other end access chip U1First
Pin VCC, chip U2Second pin connect zener diode D respectively2, capacitance C2, capacitance C2Other end access chip U2's
4th pin HS, zener diode D2Other end access chip U2The first pin VCC, chip U1With chip U2Respective
Nine pin VSS are grounded, chip U1The 8th pin IN connect microcontroller boosting output frequency signal end PWM-UP, chip
U2The 8th pin IN connect microcontroller reduced output voltage frequency signal end PWM-DN, chip U1With chip U2Respective 7th
Pin EN is all connected with the output control signal end PWM-EN, chip U of lifting breaking the bridge27th pin EN and output control signal end
PWM-EN on line Node connectedness resistance R3After be grounded, chip U1The 6th pin RDT connecting resistances R1After be grounded, chip U2The 6th
Pin RDT connecting resistances R2After be grounded；When cell voltage is less than output voltage, buck bridge circuit decompression driving chip U2Output
Signal opens metal-oxide-semiconductor Q3, pass through inductance L1Connect chip U1, metal-oxide-semiconductor Q1And Q2, boosting driving chip U1Exported by microcontroller
PWM-UP control signals driving metal-oxide-semiconductor Q1And Q2Boosting output VOUT；Conversely, when cell voltage is higher than output voltage, buck
Bridge circuit boosting driving chip U1Export signal and open metal-oxide-semiconductor Q2, pass through inductance L1Connect chip U2, metal-oxide-semiconductor Q4And Q3, decompression drive
Dynamic chip U2PWM-DN control signals are exported by microcontroller and drive metal-oxide-semiconductor Q4And Q3Reduced output voltage VOUT.
Referring to shown in Fig. 4, the principle of the utility model electronic cigarette anti-dry burning device is such, i.e. its control method,
Comprise the following steps：
(1) when electronic cigarette is started to work, microcontroller judges whether the time of switch closure exceedes the time of setting such as
0.3 millisecond, if it is not, then enter step (10), if it is, into next step；
In this step, the time for switching closure is not above 0.3 second switch time of setting, then shows switch by false touch
Touch, chopping depressuring circuit does not export, and the atomizer heat-generating units of electronic cigarette do not work, and then shows to switch closed system more than 0.3 second
Manual operation；
(2) microcontroller makes the output terminal VOUT output voltage signals of buck bridge circuit；
In this step, buck bridge circuit output voltage signal, that is, atomizer is started to work；
Microcontroller by the resistance value of atomizer continue to exceed dry combustion method protection setting resistance value number be calculated as zero；
(4) microcontroller starts timing and judges whether the milli of interval setting time such as 3 for reaching the resistance value of measurement atomizer
Second, if it is not, then continue timing and to judge, if it is, into next step；
In this step, measuring resistance timing is to need certain interval of time to carry out once because of the resistance value for measuring heat-generating units,
The interval time, 3ms was set in the microcontroller；
(5) the resistance value of micro-controller instructions atomizer resistance value detection module detection atomizer；
In this step, atomizer resistance value detection module detection resistance is realized by detecting electric current；
(6) after the resistance value for detecting atomizer, microcontroller judges whether the resistance value of atomizer exceedes dry combustion method protection setting resistance
Value is such as 0.75 ohm, if it is not, then return to step is (3), if it is, into next step；
(7) the resistance value of atomizer in abovementioned steps is continued to exceed the number+1 of dry combustion method protection setting resistance value by microcontroller；
The number that this step continues to exceed measure resistance value setting resistance value adds up；
(8) whether the cumulative number that microcontroller judges to continue to exceed dry combustion method protection setting resistance value reaches setting number, if
It is no, then return to step (4), if it is, into next step；
In this step, only when the setting resistance value that the atomizer resistance value that continuous several times detect is protected more than dry combustion method, and
And when reaching setting number, just show that atomizer lacks tobacco juice and dry combustion method occurs；
(9) microcontroller judges the state of electronic cigarette for dry-fire condition；
(10) the output of buck bridge circuit is closed, and electronic cigarette is stopped.
The above is only the preferred embodiment of the present invention, it is all done according to the utility model claims scope it is equal
Deng change and modify, should all belong to the covering scope of the utility model claims.
Claims (7)
1. a kind of anti-dry burning device of electronic cigarette, it is characterised in that including microcontroller, buck bridge circuit, atomizer resistance value
Sample circuit, atomizer, atomizer resistance value detection module, battery feed circuit, the battery feed circuit include switch and can
The battery of charging, the microcontroller are sequentially connected electrically buck bridge circuit, atomizer resistance value sample circuit, atomizer, atomization
Microcontroller is taken back after device resistance value detection module, the atomizer resistance value sample circuit is also electrically connected atomizer resistance value detection mould
Block, is connected with feedback circuit between the atomizer resistance value sample circuit and the buck bridge circuit, the feedback circuit connects
Microcontroller is returned, so that microcontroller adjusts the output voltage of buck bridge circuit and keeps stable；When electronic cigarette works, mist
Change the resistance value that device resistance value detection module continuously detects atomizer according to the interval setting time of microcontroller, when the resistance value of atomizer
When the number for continuing to exceed dry combustion method protection setting resistance value and continuing to exceed reaches setting number, micro-controller instructions lifting breaking the bridge
Circuit closes output, and electronic cigarette is automatically stopped work.
2. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that short-circuit detecting module is further included, it is described
Atomizer accesses short-circuit detecting module, and the short-circuit detecting module accesses microcontroller.
3. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that further include charging circuit, charger, fill
Electrical voltage detection module, the microcontroller is electrically connected charging circuit, the charger is electrically connected charger voltage detection mould
Block is followed by into microcontroller, and the charger is sequentially connected electrically charging circuit and battery feed circuit, the battery feed circuit
Power respectively to microcontroller and buck bridge circuit.
4. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that the microcontroller is electrically connected
LED control module and auxiliary boost module, the auxiliary boost module access the buck bridge circuit.
5. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that be additionally provided with temperature sensor and battery temperature
Detection module is spent, during charging, the temperature signal of the temperature sensor monitoring cell simultaneously accesses the battery temperature detection module,
Microcontroller is accessed by the battery feed circuit again, when temperature signal exceedes design temperature value range, microcontroller refers to
Charging circuit is made to stop charging；It is micro- when the temperature sensor detects that temperature signal exceedes design temperature value range during electric discharge
Controller instructs half-bridge booster circuit or chopping depressuring circuit to close output, and electronic cigarette is stopped.
6. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that the atomizer resistance value detection module bag
Include amplifier U4, resistance R16, resistance R17, capacitance C12, resistance R19, capacitance C13, resistance R22, capacitance C14With capacitance C15, the atomization
Device resistance value sample circuit includes resistance R18, the amplifier U4With the first pin REF, second pin GND, the 3rd pin VCC,
Four pin IN+, the 5th pin IN- and the 6th pin OUT, amplifier U4The 4th pin IN+ connect capacitance C respectively12With resistance R17
Access buck bridge circuit output terminal VOUT, the 5th pin IN- connects capacitance C respectively afterwards12With resistance R16It is defeated that atomizer is accessed afterwards
Outlet PWM-OUT, resistance R16With the on line node and resistance R of atomizer output terminal PWM-OUT17Exported with buck bridge circuit
Resistance R is connected between the on line node of end VOUT18, the 6th pin OUT connection resistance R of amplifier U419After be respectively connected to electric current inspection
Survey signal IDET and capacitance C13, capacitance C13The other end is grounded, amplifier U4The first pin REF and second pin GND ground connection, amplifier
U4The 3rd pin VCC connection resistance R22Auxiliary boost VCC-12V, the 3rd pin VCC and resistance R are accessed afterwards22Between node
Capacitance C is connected respectively15With capacitance C14, capacitance C15With capacitance C14The other end ground connection；When electric current passes through resistance R18When, resistance R18
Both ends meeting partial pressure, by resistance R16, resistance R17, capacitance C12Once filtered and be input to amplifier U again4, amplifier U4After filtering
Voltage be amplified and by resistance R19, capacitance C13Filter, then the resistance of atomizer is calculated by current detection signal IDET
Value.
7. the anti-dry burning device of electronic cigarette according to claim 1, it is characterised in that the buck bridge circuit includes chip
U1, chip U2, metal-oxide-semiconductor Q1And Q2, metal-oxide-semiconductor Q3And Q4, the first zener diode, the second zener diode, resistance R1, resistance R2, electricity
Hinder R3, capacitance C1, capacitance C3, capacitance C2, capacitance C4With inductance L1, the chip U1The first pin VCC connection capacitances C3It is followed by
Ground, chip U1The 3rd pin HO accesses metal-oxide-semiconductor Q2Grid, chip U1The tenth pin LO accesses metal-oxide-semiconductor Q1Grid, institute
State chip U2The first pin VCC connection capacitances C4After be grounded, chip U2The 3rd pin HO accesses metal-oxide-semiconductor Q3Grid, chip
U2The tenth pin LO accesses metal-oxide-semiconductor Q4Grid, chip U1The 4th pin HS pass through inductance L1Access chip U2The 4th draw
Foot HS, chip U1Second pin connect zener diode D respectively1, capacitance C1, capacitance C1Other end access chip U1The 4th
Pin HS, zener diode D1Other end access chip U1The first pin VCC, chip U2Second pin connect respectively surely
Press diode D2, capacitance C2, capacitance C2Other end access chip U2The 4th pin HS, zener diode D2Other end accesses
Chip U2The first pin VCC, chip U1With chip U2Respective 9th pin VSS is grounded, chip U1The 8th pin IN connect
The signal end PWM-UP, chip U of the boosting output frequency of microcontroller2The 8th pin IN connect microcontroller reduced output voltage frequency
The signal end PWM-DN of rate, chip U1With chip U2Respective 7th pin EN is all connected with the output control signal end of lifting breaking the bridge
PWM-EN, chip U27th pin EN and output control signal end PWM-EN on line Node connectedness resistance R3After be grounded, chip U1's
6th pin RDT connecting resistances R1After be grounded, chip U2The 6th pin RDT connecting resistances R2After be grounded；When cell voltage is less than output
During voltage, buck bridge circuit decompression driving chip U2Export signal and open metal-oxide-semiconductor Q3, pass through inductance L1Connect chip U1、MOS
Pipe Q1And Q2, boosting driving chip U1PWM-UP control signals are exported by microcontroller and drive metal-oxide-semiconductor Q1And Q2Boosting output
VOUT；Conversely, when cell voltage is higher than output voltage, buck bridge circuit boosting driving chip U1Export signal and open MOS
Pipe Q2, pass through inductance L1Connect chip U2, metal-oxide-semiconductor Q4And Q3, decompression driving chip U2PWM-DN controls are exported by microcontroller
Signal driving metal-oxide-semiconductor Q4And Q3Reduced output voltage VOUT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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